Microsoft’s search engine Bing has announced that they now use an evergreen user-agent:
#Bing future user agent is here! This will get roll out to wider set of websites as #Bingbot has turned evergreen. #webmasters the change should be transparent as we scale this out. Pls note these are additional user agents. Read more in our blog : https://t.co/vOoCgmD8S0— Bing Webmaster Team (@BingWMC) December 17, 2019
So far, Bing was crawling using existing bingbot user-agents. With this change, Bing will start the transition to a new bingbot user-agent, first for sites which require it for rendering and then gradually and carefully to all sites.
How to check if search engines can parse your web pages
Use the website audit tool in SEOprofiler to check if search engine robots can parse your web pages: